Actually, they didn't. It was just the cast and crew of the NBC sitcom, "The Office," in town to celebrate "'The Office' Wrap Party," a celebration of the beloved Scranton-set show, which will air its series finale after nine season on May 16.

But it was hard to tell the difference between The Beatles and the stars of the show.

"It felt like we were the Rolling Stones or something," said Ellie Kemper, who plays Erin, the office secretary, on the show.

The stars were mobbed during a four-block parade from the University of Scranton campus to the Lackawanna County Courthouse Square, where the cast took part in an impromptu concert of cover songs in front of an estimated 10,000 people.

The festivities also included a morning question and answer session with the producers of the show and another session with the cast at PNC Field in Moosic with about 8,000 fans on hand. Steve Carell, who found fame playing Michael Scott in "The Office," showed up as a surprise guest at the wrap up party.

"This whole thing is like a cherry on top," series star Rainn Wilson, who plays Dwight Schrute, said after the parade about the nine-season run of the show. "I've never seen a TV show that had a send-off like this."

Most of the stars were popping just as many cellphone photos as the crowd, with John Krasinski, who plays Jim Halpert, asking the crowd to pose while he took a video from his phone.

He also credited the show's fans in the city with keeping it on the air for nine years.

"It's the most surreal thing I've ever been a part of," he said. "Every show gets to say their fans are the best, but our fans changed the game. This was incredible."

The representatives from the show were given the key to the city, and Lackawanna County declared May 4 "'The Office' Day."

"Ten years ago, I picked Scranton as the setting for 'The Office,'" series creator Greg Daniels told the crowd of screaming fans. "Good call, huh?"